Extracting Part From Flywheel Cover/Housing Without Removing Engine

[coopec]

Here they steal hub caps while the car is still driving down the road.

Geez! Why you guys stay in the God-forsaken place is beyond me. (But I guess that should be the subject of a different thread)

 

[rogerthebodger]

Geez! Why you guys stay in the God-forsaken place is beyond me. (But I guess that should be the subject of a different thread)

I did consider moving to Oz a few years ago but found out I was too old.

 

[PaulRainbow]

Here they steal hub caps while the car is still driving down the road.

Hmm, how is that remotely relevant to the thread Roger ?

 

[JohnBrown1]

This is a really helpful post, I'm glad I came across it!

 

[coopec]

Hmm, how is that remotely relevant to the thread Roger ?

Extracting Part From Flywheel = extracting hub-caps from revolving wheel. Problems??

 

[RichardS]

There must be a logical explanation?

Well done Gary .... but I'm struggling to see how the flywheel/ring gear could have caused either the scoring or the eventual damage unless there was something else in there which shouldn't be. If the engine turns freely by hand, with and without the starter motor fitted, then the flywheel must surely be correctly positioned but I would check this with a piece of wire fixed to the engine which is just kissing the outer edge of the teeth. Then rotate the engine whilst someone looks very carefully to check the the piece of wire kisses the teeth equally all the way round. It seems to me that the only thing which could cause this is the flywheel or the starter cog not running concentrically such that, at some point during a revolution, the starter bearing is being forced outwards and the pressure is snapping the bearing carrier outwards.

I've never heard of anything like that before but it seems there are only two choices, a random lump of metal in the bell housing which gets stuck in the teeth or too much force being exerted on the bearing by the cogs.

If you can remove compression by removing the injectors, you could turn the new starter motor over and listen very carefully. If the starter motor seems to turn at a constant speed with a constant noise then that's good. If it is cycling in speed and noise as if there is a tight spot during each revolution, then something is not running true.

Richard

 

[rogerthebodger]

I don't know the engine and may be this is a stupid idea but could the motor be fitted upside down as it looks like the motor has 2 mounting bolts and mounting upside down would put the broken mounting casting against the flywheel teeth and tightening the bolts could push the casting against the flywheel until the cating broke

 

[Bilgediver]

Any chance the starter pinion was not identical to original as varying no of teeth are often available. A wrong pinion could do this by forcing the pinion out so overloading the bearing housing.

 

[RichardS]

I don't know the engine and may be this is a stupid idea but could the motor be fitted upside down as it looks like the motor has 2 mounting bolts and mounting upside down would put the broken mounting casting against the flywheel teeth and tightening the bolts could push the casting against the flywheel until the cating broke

I think that it would impossible to mount the starter motor upside down because it just would not push into the bellhousing. If fact, I don't think you would even be able to get the bolts/studs to locate, never mind tighten them up. Gary has also started the motor prior to the failure and the cogs could not mesh if the starter was fitted wrongly.

Richard

 

[RichardS]

Any chance the starter pinion was not identical to original as varying no of teeth are often available. A wrong pinion could do this by forcing the pinion out so overloading the bearing housing.

It's a good idea and I think it must be a mis-alignment/mis-match somewhere between pinion and flywheel. However, if it were simply that the starter pinion were too large a diameter/too many teeth, I doubt whether the pinion would ever engage with the ring gear. It would just make a racket but not turn the engine over .... but it's certainly worth comparing the pinion with the original.

Richard

 

[Jokani]

It's a good idea and I think it must be a mis-alignment/mis-match somewhere between pinion and flywheel.

Richard

The original starter is stored on the boat as a spare, I'll bring it home this weekend to measure and compare the pinions.

Also a good idea to check the ring gear alignment with a piece of wire, I'll do that if/when I next have to remove the starter.

Thanks.

 

[Jokani]

Any chance the starter pinion was not identical to original as varying no of teeth are often available. A wrong pinion could do this by forcing the pinion out so overloading the bearing housing.

Thanks, I'll check this.

 

[rogerthebodger]

I think that it would impossible to mount the starter motor upside down because it just would not push into the bellhousing. If fact, I don't think you would even be able to get the bolts/studs to locate, never mind tighten them up. Gary has also started the motor prior to the failure and the cogs could not mesh if the starter was fitted wrongly.

Richard

I did say it may be a stupid idea.

 

[RichardS]

I did say it may be a stupid idea.

It's certainly not a stupid idea, Roger. In my experience, when faced with a problem which I've never seen before, the only stupid thing to do is to rule out anything before you are 100% certain that the solution lies elsewhere.

Richard